CobaltMaghrebV1, PascalFrancis, Corpus, bibRecord, 000060

Size-dependent magnetic properties of CoFe2O4 nanoparticles prepared in polyol

Identifieur interne : 000060 ( PascalFrancis/Corpus ); précédent : 000059; suivant : 000061

Size-dependent magnetic properties of CoFe2O4 nanoparticles prepared in polyol

Auteurs : Mathieu Artus ; Lotfi Ben Tahar ; Frédéric Herbst ; Leila Smiri ; Françoise Villain ; Nader Yaacoub ; Jean-Marc Greneche ; Souad Ammar ; Fernand Fievet

Source :

Journal of physics. Condensed matter : (Print) [ 0953-8984 ] ; 2011.

RBID : Pascal:12-0048698

Descripteurs français

Pascal (Inist)
- Effet dimensionnel, Aimantation, Synthèse chimique, Diffraction RX, Microscopie électronique transmission, Spectre absorption RX, Effet Mössbauer, Microstructure, Superparamagnétisme, Synthèse nanomatériau, Effet température, Aimantation saturation, Force coercitive, Cobalt Fer Oxyde Mixte, Nanoparticule, CoFe2O4, Ferrite de cobalt.

English descriptors

KwdEn :
- Chemical synthesis, Cobalt Iron Oxides Mixed, Coercive force, Magnetization, Microstructure, Moessbauer effect, Nanomaterial synthesis, Nanoparticles, Saturation magnetization, Size effect, Superparamagnetism, Temperature effects, Transmission electron microscopy, X-ray absorption spectra, XRD.

Abstract

Highly crystalline CoFe₂O₄ nanoparticles with different diameters ranging from 2.4 to 6.1 nm have been synthesized by forced hydrolysis in polyol. The size can be controlled through adjusting the nominal water/metal molar ratio. X-ray diffraction, transmission electron microscopy, x-ray absorption spectroscopy and ⁵⁷Fe Mössbauer spectrometry were employed to investigate the structure and the microstructure of the particles produced. Magnetic measurements performed on these particles show that they are superparamagnetic with a size-dependent blocking temperature. At 5 K, high saturation magnetization (˜85 emu g^-1) approaching that of the bulk was found for the larger particles, whereas a very large coercivity (14.5 kOe) is observed for the 3.5 nm sized particles.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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A02	`01`			`@0 JCOMEL`
A03		`1`		`@0 J. phys., Condens. matter : (Print)`
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A06				`@2 50`
A08	`01`	`1`	`ENG`	`@1 Size-dependent magnetic properties of CoFe₂O₄ nanoparticles prepared in polyol`
A11	`01`	`1`		`@1 ARTUS (Mathieu)`
A11	`02`	`1`		`@1 BEN TAHAR (Lotfi)`
A11	`03`	`1`		`@1 HERBST (Frédéric)`
A11	`04`	`1`		`@1 SMIRI (Leila)`
A11	`05`	`1`		`@1 VILLAIN (Françoise)`
A11	`06`	`1`		`@1 YAACOUB (Nader)`
A11	`07`	`1`		`@1 GRENECHE (Jean-Marc)`
A11	`08`	`1`		`@1 AMMAR (Souad)`
A11	`09`	`1`		`@1 FIEVET (Fernand)`
A14	`01`			`@1 ITODYS, Université Paris Diderot, CNRS UMR-7086 @2 75205, Paris @3 FRA @Z 1 aut. @Z 3 aut. @Z 8 aut. @Z 9 aut.`
A14	`02`			`@1 LSSMI, 99/UR 12-30, Faculté des Sciences de Bizerte @2 7021 Zarzouna @3 TUN @Z 2 aut. @Z 4 aut.`
A14	`03`			`@1 Synchrotron SOLEIL @2 91192 Gif-sur-Yvette @3 FRA @Z 5 aut.`
A14	`04`			`@1 LPEC, Université du Maine, CNRS UMR-6087 @2 72085 Le Mans @3 FRA @Z 6 aut. @Z 7 aut.`
A20				`@2 506001.1-506001.9`
A21				`@1 2011`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 577E2 @5 354000508609990140`
A44				`@0 0000 @1 © 2012 INIST-CNRS. All rights reserved.`
A45				`@0 43 ref.`
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A61				`@0 A`
A64	`01`	`1`		`@0 Journal of physics. Condensed matter : (Print)`
A66	`01`			`@0 GBR`
C01	`01`		`ENG`	@0 Highly crystalline CoFe₂O₄ nanoparticles with different diameters ranging from 2.4 to 6.1 nm have been synthesized by forced hydrolysis in polyol. The size can be controlled through adjusting the nominal water/metal molar ratio. X-ray diffraction, transmission electron microscopy, x-ray absorption spectroscopy and ⁵⁷Fe Mössbauer spectrometry were employed to investigate the structure and the microstructure of the particles produced. Magnetic measurements performed on these particles show that they are superparamagnetic with a size-dependent blocking temperature. At 5 K, high saturation magnetization (˜85 emu g^-1) approaching that of the bulk was found for the larger particles, whereas a very large coercivity (14.5 kOe) is observed for the 3.5 nm sized particles.
C02	`01`	`3`		`@0 001B70E20`
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C02	`03`	`3`		`@0 001B70F80`
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C03	`01`	`3`	`ENG`	`@0 Size effect @5 02`
C03	`02`	`3`	`FRE`	`@0 Aimantation @5 03`
C03	`02`	`3`	`ENG`	`@0 Magnetization @5 03`
C03	`03`	`X`	`FRE`	`@0 Synthèse chimique @5 04`
C03	`03`	`X`	`ENG`	`@0 Chemical synthesis @5 04`
C03	`03`	`X`	`SPA`	`@0 Síntesis química @5 04`
C03	`04`	`3`	`FRE`	`@0 Diffraction RX @5 05`
C03	`04`	`3`	`ENG`	`@0 XRD @5 05`
C03	`05`	`3`	`FRE`	`@0 Microscopie électronique transmission @5 06`
C03	`05`	`3`	`ENG`	`@0 Transmission electron microscopy @5 06`
C03	`06`	`3`	`FRE`	`@0 Spectre absorption RX @5 07`
C03	`06`	`3`	`ENG`	`@0 X-ray absorption spectra @5 07`
C03	`07`	`3`	`FRE`	`@0 Effet Mössbauer @5 08`
C03	`07`	`3`	`ENG`	`@0 Moessbauer effect @5 08`
C03	`08`	`3`	`FRE`	`@0 Microstructure @5 09`
C03	`08`	`3`	`ENG`	`@0 Microstructure @5 09`
C03	`09`	`3`	`FRE`	`@0 Superparamagnétisme @5 10`
C03	`09`	`3`	`ENG`	`@0 Superparamagnetism @5 10`
C03	`10`	`X`	`FRE`	`@0 Synthèse nanomatériau @5 11`
C03	`10`	`X`	`ENG`	`@0 Nanomaterial synthesis @5 11`
C03	`10`	`X`	`SPA`	`@0 Síntesis nanomaterial @5 11`
C03	`11`	`3`	`FRE`	`@0 Effet température @5 12`
C03	`11`	`3`	`ENG`	`@0 Temperature effects @5 12`
C03	`12`	`X`	`FRE`	`@0 Aimantation saturation @5 13`
C03	`12`	`X`	`ENG`	`@0 Saturation magnetization @5 13`
C03	`12`	`X`	`SPA`	`@0 Imanación saturación @5 13`
C03	`13`	`3`	`FRE`	`@0 Force coercitive @5 14`
C03	`13`	`3`	`ENG`	`@0 Coercive force @5 14`
C03	`14`	`X`	`FRE`	`@0 Cobalt Fer Oxyde Mixte @2 NC @2 NA @5 15`
C03	`14`	`X`	`ENG`	`@0 Cobalt Iron Oxides Mixed @2 NC @2 NA @5 15`
C03	`14`	`X`	`SPA`	`@0 Mixto @2 NC @2 NA @5 15`
C03	`15`	`3`	`FRE`	`@0 Nanoparticule @5 16`
C03	`15`	`3`	`ENG`	`@0 Nanoparticles @5 16`
C03	`16`	`3`	`FRE`	`@0 CoFe2O4 @4 INC @5 52`
C03	`17`	`3`	`FRE`	`@0 Ferrite de cobalt @4 INC @5 53`
N21				`@1 030`

Format Inist (serveur)

NO :	PASCAL 12-0048698 INIST
ET :	Size-dependent magnetic properties of CoFe₂O₄ nanoparticles prepared in polyol
AU :	ARTUS (Mathieu); BEN TAHAR (Lotfi); HERBST (Frédéric); SMIRI (Leila); VILLAIN (Françoise); YAACOUB (Nader); GRENECHE (Jean-Marc); AMMAR (Souad); FIEVET (Fernand)
AF :	ITODYS, Université Paris Diderot, CNRS UMR-7086/75205, Paris/France (1 aut., 3 aut., 8 aut., 9 aut.); LSSMI, 99/UR 12-30, Faculté des Sciences de Bizerte/7021 Zarzouna/Tunisie (2 aut., 4 aut.); Synchrotron SOLEIL/91192 Gif-sur-Yvette/France (5 aut.); LPEC, Université du Maine, CNRS UMR-6087/72085 Le Mans/France (6 aut., 7 aut.)
DT :	Publication en série; Niveau analytique
SO :	Journal of physics. Condensed matter : (Print); ISSN 0953-8984; Coden JCOMEL; Royaume-Uni; Da. 2011; Vol. 23; No. 50; 506001.1-506001.9; Bibl. 43 ref.
LA :	Anglais
EA :	Highly crystalline CoFe₂O₄ nanoparticles with different diameters ranging from 2.4 to 6.1 nm have been synthesized by forced hydrolysis in polyol. The size can be controlled through adjusting the nominal water/metal molar ratio. X-ray diffraction, transmission electron microscopy, x-ray absorption spectroscopy and ⁵⁷Fe Mössbauer spectrometry were employed to investigate the structure and the microstructure of the particles produced. Magnetic measurements performed on these particles show that they are superparamagnetic with a size-dependent blocking temperature. At 5 K, high saturation magnetization (˜85 emu g^-1) approaching that of the bulk was found for the larger particles, whereas a very large coercivity (14.5 kOe) is observed for the 3.5 nm sized particles.
CC :	001B70E20; 001B70E75; 001B70F80
FD :	Effet dimensionnel; Aimantation; Synthèse chimique; Diffraction RX; Microscopie électronique transmission; Spectre absorption RX; Effet Mössbauer; Microstructure; Superparamagnétisme; Synthèse nanomatériau; Effet température; Aimantation saturation; Force coercitive; Cobalt Fer Oxyde Mixte; Nanoparticule; CoFe2O4; Ferrite de cobalt
ED :	Size effect; Magnetization; Chemical synthesis; XRD; Transmission electron microscopy; X-ray absorption spectra; Moessbauer effect; Microstructure; Superparamagnetism; Nanomaterial synthesis; Temperature effects; Saturation magnetization; Coercive force; Cobalt Iron Oxides Mixed; Nanoparticles
SD :	Síntesis química; Síntesis nanomaterial; Imanación saturación; Mixto
LO :	INIST-577E2.354000508609990140
ID :	12-0048698

Links to Exploration step

Pascal:12-0048698

Le document en format XML

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 nanoparticles prepared in polyol</title>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Size-dependent magnetic properties of CoFe<sub>2</sub>
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 nanoparticles prepared in polyol</title>
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<author><name sortKey="Smiri, Leila" sort="Smiri, Leila" uniqKey="Smiri L" first="Leila" last="Smiri">Leila Smiri</name>
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<author><name sortKey="Villain, Francoise" sort="Villain, Francoise" uniqKey="Villain F" first="Françoise" last="Villain">Françoise Villain</name>
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<author><name sortKey="Yaacoub, Nader" sort="Yaacoub, Nader" uniqKey="Yaacoub N" first="Nader" last="Yaacoub">Nader Yaacoub</name>
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<author><name sortKey="Greneche, Jean Marc" sort="Greneche, Jean Marc" uniqKey="Greneche J" first="Jean-Marc" last="Greneche">Jean-Marc Greneche</name>
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<s2>72085 Le Mans</s2>
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<author><name sortKey="Ammar, Souad" sort="Ammar, Souad" uniqKey="Ammar S" first="Souad" last="Ammar">Souad Ammar</name>
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<s2>75205, Paris</s2>
<s3>FRA</s3>
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</author>
<author><name sortKey="Fievet, Fernand" sort="Fievet, Fernand" uniqKey="Fievet F" first="Fernand" last="Fievet">Fernand Fievet</name>
<affiliation><inist:fA14 i1="01"><s1>ITODYS, Université Paris Diderot, CNRS UMR-7086</s1>
<s2>75205, Paris</s2>
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<series><title level="j" type="main">Journal of physics. Condensed matter : (Print)</title>
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<seriesStmt><title level="j" type="main">Journal of physics. Condensed matter : (Print)</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Chemical synthesis</term>
<term>Cobalt Iron Oxides Mixed</term>
<term>Coercive force</term>
<term>Magnetization</term>
<term>Microstructure</term>
<term>Moessbauer effect</term>
<term>Nanomaterial synthesis</term>
<term>Nanoparticles</term>
<term>Saturation magnetization</term>
<term>Size effect</term>
<term>Superparamagnetism</term>
<term>Temperature effects</term>
<term>Transmission electron microscopy</term>
<term>X-ray absorption spectra</term>
<term>XRD</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Effet dimensionnel</term>
<term>Aimantation</term>
<term>Synthèse chimique</term>
<term>Diffraction RX</term>
<term>Microscopie électronique transmission</term>
<term>Spectre absorption RX</term>
<term>Effet Mössbauer</term>
<term>Microstructure</term>
<term>Superparamagnétisme</term>
<term>Synthèse nanomatériau</term>
<term>Effet température</term>
<term>Aimantation saturation</term>
<term>Force coercitive</term>
<term>Cobalt Fer Oxyde Mixte</term>
<term>Nanoparticule</term>
<term>CoFe2O4</term>
<term>Ferrite de cobalt</term>
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<front><div type="abstract" xml:lang="en">Highly crystalline CoFe<sub>2</sub>
O<sub>4</sub>
 nanoparticles with different diameters ranging from 2.4 to 6.1 nm have been synthesized by forced hydrolysis in polyol. The size can be controlled through adjusting the nominal water/metal molar ratio. X-ray diffraction, transmission electron microscopy, x-ray absorption spectroscopy and <sup>57</sup>
Fe Mössbauer spectrometry were employed to investigate the structure and the microstructure of the particles produced. Magnetic measurements performed on these particles show that they are superparamagnetic with a size-dependent blocking temperature. At 5 K, high saturation magnetization (˜85 emu g<sup>-1</sup>
) approaching that of the bulk was found for the larger particles, whereas a very large coercivity (14.5 kOe) is observed for the 3.5 nm sized particles.</div>
</front>
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 nanoparticles prepared in polyol</s1>
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<fA11 i1="01" i2="1"><s1>ARTUS (Mathieu)</s1>
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<fA11 i1="02" i2="1"><s1>BEN TAHAR (Lotfi)</s1>
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<fA11 i1="05" i2="1"><s1>VILLAIN (Françoise)</s1>
</fA11>
<fA11 i1="06" i2="1"><s1>YAACOUB (Nader)</s1>
</fA11>
<fA11 i1="07" i2="1"><s1>GRENECHE (Jean-Marc)</s1>
</fA11>
<fA11 i1="08" i2="1"><s1>AMMAR (Souad)</s1>
</fA11>
<fA11 i1="09" i2="1"><s1>FIEVET (Fernand)</s1>
</fA11>
<fA14 i1="01"><s1>ITODYS, Université Paris Diderot, CNRS UMR-7086</s1>
<s2>75205, Paris</s2>
<s3>FRA</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
</fA14>
<fA14 i1="02"><s1>LSSMI, 99/UR 12-30, Faculté des Sciences de Bizerte</s1>
<s2>7021 Zarzouna</s2>
<s3>TUN</s3>
<sZ>2 aut.</sZ>
<sZ>4 aut.</sZ>
</fA14>
<fA14 i1="03"><s1>Synchrotron SOLEIL</s1>
<s2>91192 Gif-sur-Yvette</s2>
<s3>FRA</s3>
<sZ>5 aut.</sZ>
</fA14>
<fA14 i1="04"><s1>LPEC, Université du Maine, CNRS UMR-6087</s1>
<s2>72085 Le Mans</s2>
<s3>FRA</s3>
<sZ>6 aut.</sZ>
<sZ>7 aut.</sZ>
</fA14>
<fA20><s2>506001.1-506001.9</s2>
</fA20>
<fA21><s1>2011</s1>
</fA21>
<fA23 i1="01"><s0>ENG</s0>
</fA23>
<fA43 i1="01"><s1>INIST</s1>
<s2>577E2</s2>
<s5>354000508609990140</s5>
</fA43>
<fA44><s0>0000</s0>
<s1>© 2012 INIST-CNRS. All rights reserved.</s1>
</fA44>
<fA45><s0>43 ref.</s0>
</fA45>
<fA47 i1="01" i2="1"><s0>12-0048698</s0>
</fA47>
<fA60><s1>P</s1>
</fA60>
<fA61><s0>A</s0>
</fA61>
<fA64 i1="01" i2="1"><s0>Journal of physics. Condensed matter : (Print)</s0>
</fA64>
<fA66 i1="01"><s0>GBR</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>Highly crystalline CoFe<sub>2</sub>
O<sub>4</sub>
 nanoparticles with different diameters ranging from 2.4 to 6.1 nm have been synthesized by forced hydrolysis in polyol. The size can be controlled through adjusting the nominal water/metal molar ratio. X-ray diffraction, transmission electron microscopy, x-ray absorption spectroscopy and <sup>57</sup>
Fe Mössbauer spectrometry were employed to investigate the structure and the microstructure of the particles produced. Magnetic measurements performed on these particles show that they are superparamagnetic with a size-dependent blocking temperature. At 5 K, high saturation magnetization (˜85 emu g<sup>-1</sup>
) approaching that of the bulk was found for the larger particles, whereas a very large coercivity (14.5 kOe) is observed for the 3.5 nm sized particles.</s0>
</fC01>
<fC02 i1="01" i2="3"><s0>001B70E20</s0>
</fC02>
<fC02 i1="02" i2="3"><s0>001B70E75</s0>
</fC02>
<fC02 i1="03" i2="3"><s0>001B70F80</s0>
</fC02>
<fC03 i1="01" i2="3" l="FRE"><s0>Effet dimensionnel</s0>
<s5>02</s5>
</fC03>
<fC03 i1="01" i2="3" l="ENG"><s0>Size effect</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="3" l="FRE"><s0>Aimantation</s0>
<s5>03</s5>
</fC03>
<fC03 i1="02" i2="3" l="ENG"><s0>Magnetization</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE"><s0>Synthèse chimique</s0>
<s5>04</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Chemical synthesis</s0>
<s5>04</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Síntesis química</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="3" l="FRE"><s0>Diffraction RX</s0>
<s5>05</s5>
</fC03>
<fC03 i1="04" i2="3" l="ENG"><s0>XRD</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="3" l="FRE"><s0>Microscopie électronique transmission</s0>
<s5>06</s5>
</fC03>
<fC03 i1="05" i2="3" l="ENG"><s0>Transmission electron microscopy</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="3" l="FRE"><s0>Spectre absorption RX</s0>
<s5>07</s5>
</fC03>
<fC03 i1="06" i2="3" l="ENG"><s0>X-ray absorption spectra</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="3" l="FRE"><s0>Effet Mössbauer</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="3" l="ENG"><s0>Moessbauer effect</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="3" l="FRE"><s0>Microstructure</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="3" l="ENG"><s0>Microstructure</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="3" l="FRE"><s0>Superparamagnétisme</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="3" l="ENG"><s0>Superparamagnetism</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Synthèse nanomatériau</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Nanomaterial synthesis</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Síntesis nanomaterial</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="3" l="FRE"><s0>Effet température</s0>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="3" l="ENG"><s0>Temperature effects</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Aimantation saturation</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Saturation magnetization</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Imanación saturación</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="3" l="FRE"><s0>Force coercitive</s0>
<s5>14</s5>
</fC03>
<fC03 i1="13" i2="3" l="ENG"><s0>Coercive force</s0>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE"><s0>Cobalt Fer Oxyde Mixte</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>15</s5>
</fC03>
<fC03 i1="14" i2="X" l="ENG"><s0>Cobalt Iron Oxides Mixed</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>15</s5>
</fC03>
<fC03 i1="14" i2="X" l="SPA"><s0>Mixto</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>15</s5>
</fC03>
<fC03 i1="15" i2="3" l="FRE"><s0>Nanoparticule</s0>
<s5>16</s5>
</fC03>
<fC03 i1="15" i2="3" l="ENG"><s0>Nanoparticles</s0>
<s5>16</s5>
</fC03>
<fC03 i1="16" i2="3" l="FRE"><s0>CoFe2O4</s0>
<s4>INC</s4>
<s5>52</s5>
</fC03>
<fC03 i1="17" i2="3" l="FRE"><s0>Ferrite de cobalt</s0>
<s4>INC</s4>
<s5>53</s5>
</fC03>
<fN21><s1>030</s1>
</fN21>
</pA>
</standard>
<server><NO>PASCAL 12-0048698 INIST</NO>
<ET>Size-dependent magnetic properties of CoFe<sub>2</sub>
O<sub>4</sub>
 nanoparticles prepared in polyol</ET>
<AU>ARTUS (Mathieu); BEN TAHAR (Lotfi); HERBST (Frédéric); SMIRI (Leila); VILLAIN (Françoise); YAACOUB (Nader); GRENECHE (Jean-Marc); AMMAR (Souad); FIEVET (Fernand)</AU>
<AF>ITODYS, Université Paris Diderot, CNRS UMR-7086/75205, Paris/France (1 aut., 3 aut., 8 aut., 9 aut.); LSSMI, 99/UR 12-30, Faculté des Sciences de Bizerte/7021 Zarzouna/Tunisie (2 aut., 4 aut.); Synchrotron SOLEIL/91192 Gif-sur-Yvette/France (5 aut.); LPEC, Université du Maine, CNRS UMR-6087/72085 Le Mans/France (6 aut., 7 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Journal of physics. Condensed matter : (Print); ISSN 0953-8984; Coden JCOMEL; Royaume-Uni; Da. 2011; Vol. 23; No. 50; 506001.1-506001.9; Bibl. 43 ref.</SO>
<LA>Anglais</LA>
<EA>Highly crystalline CoFe<sub>2</sub>
O<sub>4</sub>
 nanoparticles with different diameters ranging from 2.4 to 6.1 nm have been synthesized by forced hydrolysis in polyol. The size can be controlled through adjusting the nominal water/metal molar ratio. X-ray diffraction, transmission electron microscopy, x-ray absorption spectroscopy and <sup>57</sup>
Fe Mössbauer spectrometry were employed to investigate the structure and the microstructure of the particles produced. Magnetic measurements performed on these particles show that they are superparamagnetic with a size-dependent blocking temperature. At 5 K, high saturation magnetization (˜85 emu g<sup>-1</sup>
) approaching that of the bulk was found for the larger particles, whereas a very large coercivity (14.5 kOe) is observed for the 3.5 nm sized particles.</EA>
<CC>001B70E20; 001B70E75; 001B70F80</CC>
<FD>Effet dimensionnel; Aimantation; Synthèse chimique; Diffraction RX; Microscopie électronique transmission; Spectre absorption RX; Effet Mössbauer; Microstructure; Superparamagnétisme; Synthèse nanomatériau; Effet température; Aimantation saturation; Force coercitive; Cobalt Fer Oxyde Mixte; Nanoparticule; CoFe2O4; Ferrite de cobalt</FD>
<ED>Size effect; Magnetization; Chemical synthesis; XRD; Transmission electron microscopy; X-ray absorption spectra; Moessbauer effect; Microstructure; Superparamagnetism; Nanomaterial synthesis; Temperature effects; Saturation magnetization; Coercive force; Cobalt Iron Oxides Mixed; Nanoparticles</ED>
<SD>Síntesis química; Síntesis nanomaterial; Imanación saturación; Mixto</SD>
<LO>INIST-577E2.354000508609990140</LO>
<ID>12-0048698</ID>
</server>
</inist>
</record>

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Size-dependent magnetic properties of CoFe2O4 nanoparticles prepared in polyol

Size-dependent magnetic properties of CoFe2O4 nanoparticles prepared in polyol

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